Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues	$ 1,840,739	$ 1,882,187	$ 1,543,386
Cost of sales	(1,274,142)	(1,340,666)	(1,096,546)
Gross profit	566,597	541,521	446,840
Selling, general and administrative expenses	(345,926)	(319,034)	(273,270)
Research and development	(65,410)	(54,752)	(41,730)
Amortization of intangibles	(22,792)	(13,149)	(10,567)
Income from equity method investment	9,704	13,169	11,940
Asset impairment and loss on sale of assets	(33,676)	(2,549)	(16,574)
Operating income	108,497	165,206	116,639
Interest expense	(52,038)	(48,118)	(49,822)
Interest income	1,033	1,011	1,184
Loss on debt extinguishment	(52,450)
Other income			1,465
Income from continuing operations before taxes	5,042	118,099	69,466
Income tax benefit (expense)	38,194	(16,791)	(8,190)
Income from continuing operations	43,236	101,308	61,276
Income from discontinued operations, net of tax	16,774	13,037	2,336
Gain from disposal of discontinued operations, net of tax	134,480		44,847
Net income	$ 194,490	$ 114,345	$ 108,459
Weighted average number of common shares and equivalents:
Basic	45,097	47,109	46,805
Diluted	45,942	48,104	47,783
Basic income per share:
Continuing operations	$ 0.96	$ 2.15	$ 1.31
Discontinued operations	$ 0.37	$ 0.28	$ 0.05
Disposal of discontinued operations	$ 2.98		$ 0.96
Net income	$ 4.31	$ 2.43	$ 2.32
Diluted income per share:
Continuing operations	$ 0.94	$ 2.11	$ 1.28
Discontinued operations	$ 0.36	$ 0.27	$ 0.05
Disposal of discontinued operations	$ 2.93		$ 0.94
Net income	$ 4.23	$ 2.38	$ 2.27